This is the kit I put together on Amazon last week.

CO2 inflator
Amazon.com : Innovations Air Chuck Elite Inflator : Sports & Outdoors
Tire levers
Amazon.com : Kool Stop Bicycle Tire Levers : Bike Brake Levers : Sports & Outdoors
Tube
Amazon.com : Kool Stop Bicycle Tire Levers : Bike Brake Levers : Sports & Outdoors
Bag
Amazon.com : Cycling Bike Bicycle Saddle Bag Pouch Back Seat Bag Black and Blue Bag : Bike Wedges : Sports & Outdoors
extra CO2
Amazon.com : 16g Threaded CO2 Cartridges 6-Pack Mole-Zap/Ant Zap Refills : Sports & Outdoors

My bag choice is a mistake as Amazon deliberately hides the fact that is shipping in the slow boat from china and will be in transit for 30 days.

As this is emergency equipment I have not tested it yet.

Now I wish I had bought this kit.
Amazon.com : Genuine Innovations Tire Repair & Inflation Deluxe Kit : Bike Seat Packs : Sports & Outdoors

Walta